Geometric Attribute Vocabulary

Fill in the blank: An angle measuring less than 90° is called an _________.

• acute angle

• obtuse angle

• right angle

• straight angle

Fill in the blank: An angle measuring more than 90° is called an _________.

• obtuse angle

• acute angle

• right angle

• straight angle

Fill in the blank: An angle measuring exactly 90° is called a _________.

• right angle

• acute angle

• obtuse angle

• straight angle

Fill in the blank: Two or more lines that lie in the same plane and never intersect are called _________.

• parallel lines

• perpendicular lines

• intersecting lines

• skew lines

Fill in the blank: Two straight lines that intersect at 90° angles are called _________.

• perpendicular lines

• parallel lines

• skew lines

• concurrent lines

Fill in the blank: Having all sides equal in length is called _________.

• equilateral

• isosceles

• scalene

• right-angled

Fill in the blank: Having equal angles is called _________.

• equiangular

• isosceles

• scalene

• obtuse

Fill in the blank: Having the same shape and same size is called _________.

• congruent

• similar

• identical

• equal

Fill in the blank: A line that divides a shape or object into two congruent pieces is called a _________.

• line of symmetry

• axis of rotation

• tangent line

• perpendicular bisector